Hi Liz,
I tried to use the code you suggested:
sub trait_mod:<is>(Attribute:D \attribute, :&proxy!) {
attribute.package.^add_method(attribute.name, my method () { proxy($_) })
}
class A {
has $!a is proxy({ $^a * 2 });
has $!b is proxy({ $^a * 3 });
}
my A $a .= new;
$a.a = 21; # <-- No such method 'a' for invocant of type 'A'
say $a.a;
$a.b = 21;
say $a.b;
But I got an error on the first assignment.
What am I doing wrong?
On Fri, Nov 17, 2017 at 1:27 AM, Elizabeth Mattijsen <[email protected]> wrote:
> Oops,
>
> > On 17 Nov 2017, at 01:24, Elizabeth Mattijsen <[email protected]> wrote:
> > sub trait_mod:<is>(\attribute, :&proxy!) is export {
>
> sub trait_mod:<is>(Attribute:D \attribute, :&proxy!) is export {
>
> so that the trait can only be used on Attribute objects.
>
>
>
> Liz
>
--
Fernando Santagata
